Wet Oxidation of PVA-Containing Desizing Wastewater

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Wet Oxidation of PVA-Containing Desizing Wastewater

LEI Lecheng; WANG Dahui

Department of Environmental Science and Engineering,College of Chemical Engineering,
Zhejiang University,Hangzhou 310027, China

Received:1900-01-01 Revised:1900-01-01 Online:2000-03-28 Published:2000-03-28
Contact: LEI Lecheng

Wet Oxidation of PVA-Containing Desizing Wastewater

雷乐成; 汪大翠

Department of Environmental Science and Engineering,College of Chemical Engineering,
Zhejiang University,Hangzhou 310027, China

通讯作者: 雷乐成

Abstract

Abstract: Polyvinyl alcohol (PVA)-containing desizing wastewater was treated by variouswet oxidation
methods. Parameters such as reaction temperature, initialsolution pH, and thedosage of H2O2
were investigated in terms of chemical oxygendemand (CODCr) and totalorganic carbon (TOC)
removal rate. Up to 90% of the initialCODCr was removed by wet air oxidation(WAO) at270 C
with stoichiometric oxygen supply. while at temperature of200 C, the CODCr removalrate was
found to be 80%. Similar results were obtained by PromotedWAO (PWAO) and wet peroxide
oxidation(WPO) at a lowertemperature of 150 C. Reaction temperature was found to havea
significant effect on theoxidation performance for all the methods. Initial solutionpH was
observed to play asignificant role in PWAO and WPO where H2O2 was employed.Comparison of
WAO, CWAO(catalytic wet air oxidation), PWAO and WPO shows that the rate ofCODCr removal
increases in the order: WAO, CWAO,PWAO and WPO.

Key words: textile wastewater, wet oxidation, wet peroxide oxidationminipage

摘要： Polyvinyl alcohol (PVA)-containing desizing wastewater was treated by variouswet oxidation
methods. Parameters such as reaction temperature, initialsolution pH, and thedosage of H2O2
were investigated in terms of chemical oxygendemand (CODCr) and totalorganic carbon (TOC)
removal rate. Up to 90% of the initialCODCr was removed by wet air oxidation(WAO) at270 C
with stoichiometric oxygen supply. while at temperature of200 C, the CODCr removalrate was
found to be 80%. Similar results were obtained by PromotedWAO (PWAO) and wet peroxide
oxidation(WPO) at a lowertemperature of 150 C. Reaction temperature was found to havea
significant effect on theoxidation performance for all the methods. Initial solutionpH was
observed to play asignificant role in PWAO and WPO where H2O2 was employed.Comparison of
WAO, CWAO(catalytic wet air oxidation), PWAO and WPO shows that the rate ofCODCr removal
increases in the order: WAO, CWAO,PWAO and WPO.

关键词: textile wastewater;wet oxidation;wet peroxide oxidationminipage

LEI Lecheng, WANG Dahui. Wet Oxidation of PVA-Containing Desizing Wastewater[J]. .

雷乐成, 汪大翠. Wet Oxidation of PVA-Containing Desizing Wastewater[J]. CIESC Journal.

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